@article{oai:omu.repo.nii.ac.jp:00000399,
 author = {Mizutani, Akio and Eto, Yohei and Kikuta, Hisao},
 issue = {12},
 journal = {Applied Physics Express (APEX)},
 month = {Nov},
 note = {application/pdf, Article, Applied Physics Express (APEX). 2017, 10 (12), p.122501-1-122501-4},
 pages = {122501-1--122501-4},
 title = {A grating coupler with a trapezoidal hole array for perfectly vertical light coupling between optical fibers and waveguides},
 volume = {10},
 year = {2017}
}